Polishing-machine.



P. H. DICKSON.

POLISHING MACHINE.

Anmoulox rILnn un. 11.1908.

908,977. Patented .Im 5, 1909.

3 SHEETS-SHEET 1.

W D-'Qkson Alfamqy s P. H.y DIGKSON. POLISHIHNG MACHINE. APPLIoATIoN FILED APR.17.1908.

908,977. A Patented Jan. 5, 1909.

3 SHEETS-SHEET 2.

v INVENTOR W/TNESSES. F1 D i C k s o n nar Numus PETERS ca., wAsmNGroN, D. c.

F. H. DICKSON.

POLISHING MAHINE.

APPLICATION FILED APR.17.1908.

908,977. Patented Jan. 5,1909.

3 SHEETS-SHEET 3.

FRANK H. DIOKSON, OF OSWEGO, NEW YORK.

POLISHIN G-MACHIN E Specification of Letters Patent.

Patented Jan. 5, 1909.

Application filed April 17, 1908. Serial No. 427,730.

To all 'whom 'it may concern:

Be it known that I, FRANK I-I. DIcKsoN, a citizen of the United States, residing at Oswego, in the county of Oswego and State of New York, have invented certain new and useful Improvements in Polishing-Machines 5 and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in polishing machines, and it is an object of the invention to provide a novel device of this character employing two endless polishing belts, so that two surfaces of an article may be operated upon simultaneously.

It is also an object ofthe invention to provide a novel device of this character wherein the polishing belts may be so adjusted as to compensate for articles of various sizes.

It is also an object of the invention to rovide a novel device of this character emp oyingin combination with a plurality of polishing belts, means for causing the belts to contact with the work to be operated upon.

' It is also an object of the invention to provide a novel device of this character, which will be simple in construction, efficient and advantageousin practice and comparatively inex ensive to manufacture. j

Wfth the above and other obj ects in view, the invention consists in the details of con* struction and in the novel arrangement and combination of parts to be hereinafter more particularly referred to.

In describing the invention in detail, reference will be had to the accom anying drawings forming part of this speci cation, wherein like characters -of reference denote corresponding parts in the several views, and in which* Figure 1 is a view in side elevation of the invention, Fig.2 is an end elevation of the invention, Fig. 3 is a sectional view illustrating certain features of the invention in detail, and, Fig. 4 is a diagrammatic view illustrating the means for rotating the belt carrying wheels.

In the drawings, 1 denotes the end frames, which may be constructed as desired and connected one to the other by the side bars 2.

Slidably mounted on the upper side bars 2, are the standards 3. Each of the standards 3 has projecting from its under surface, an extension 4, which asses between the side bars 2 and has affixed thereto a head 5, which is of greater width than the space between the side bars 2 and holds the bar against displacement, as is believed to be apparent.

Loosely passing through an end frame, is a rod 6 having a threaded ortion 7 passing through the extension 4. (gn the outer end, this rod 6 is provided with an operating handle 8. It will thus be seen that the standards can be adjusted one with relation to the other.

The central portion of each of the standards is cut away, as at 9, and in this cutaway portion is slidably mounted a block 10, which has threaded there through a rod 11, which passes loosely through the top of the standard. The upper' end of this rod 11 is provided with an operating handle 12. It is thought to be apparent that by the proper rotation of the handle 12, and the rod 11, to which it is ailixed, the block 10 may be adjusted vertically.

On the inner face of the block 10 is formed a bearing 13, in which is mounted a shaft 14 having fixed thereto a grooved wheel 15. The bearing 13 pro'ects beyond one side of the standard 3 and as projecting outwardly therefrom, an extension 16, which is adapted to contact with a side of the bearin 3 to hold the bearing against any undue Iateral movement. ,This extension is positioned to contact with the side of the bearing 3 adjacent the wheel 15. It is also to be stated that the shaft 14 is of such length as to bring the wheel 15 be ond a side of the frame, as is more particu arly shown in Fig. 1.

Mounted beneath the wheel 15 and in the same vertical plane, is a grooved Wheel 17 fixed on a shaft 18. This shaft 18 is mounted in bearings 19 and 20. The bearing 19 is slidably mounted on the lower side bar 2, while the bearing 20 is slidably mounted in an extension frame 21, arranged a distance from the side of the main frame, opposed to the side having the wheels. is engaged by a threaded rod 22, while the bearing 20 is engaged by a threaded rod 23. Each of these rods is provided with a turning The bearing 19 Y .105 crank 24. By this arrangement, it will be seen that the wheels 17 can be adjusted one with relation to the other, independently of the adjustment of the wheels 15. Each of the wheels 15 and 17 have passing therearound and resting within the grooves thereof, an endless belt 25, having a suitable polishing or abrading surface, adapted to contact upon the surface of an article to be polished.

By having the upper wheels 16 vertically adjustable, various sized belts 25 may be employed and by having the wheels 15 and 17 adjustable, one independently of the other, the belts 25 may be arranged on various inclines or angles in order to compensate for the surfaces of various coniigurations, as is believed to be apparent.

Positioned between the opposed faces of the belts 25, when a plied, is a work holder 26, fixed to a cross bar 27 having its outer face provided with a dove-tail ton ue 29. This dove-tail tongue 29 projects wit 'n corresponding grooves of carriages 28, arranged one adjacent the inner face of the opposed portions of the belt. Each of these carriaffes 28 has mounted therein, a shaft 29/ an to the inner end of the shaft 29 is fixed a disk 30. The disk 30 is of such size as to have a portion thereof beyond its center contacting with the belt 25 in order that the same may be forced upon an article to be olished placed upon the work holder 26.

y having this disk rotatable, the possibility of friction between the belt and disk is prevented. If desired, the carriages 28 carrying the disks 30 may be removed and other carriages substituted therefor, having stationary plates of a configuration desired. In other words, it is to be stated that the disk 30 or a plate employed in lieu thereof, is engaged as a guide for the polishin belt. In order that the carriages 28 may e removed with facility, it is to be observed that the dove tail tongue 29 projects beyond the face of the frame.

Pivoted intermediate its length to the under fa'ce of the cross bar 27, as at 31, is a lever 32. Intermediate the pivot 31 and the outer end of the lever, the lever is pivoted as at 33, to the under surface of the adjacent carriage 28. Pivoted to the lever 32 intermediate the pivot 31 and the inner end of the lever, is an end of a link 34, which has its opposite end portion in pivotal engagement with an arm 35, projecting inwardly from the under surface of the second carriage 28. By this arrangement, it will be seen that when the lever 32 is moved, both of the carriages 28 will move simultaneously and in a direction in accordance with the direction of movement of the lever 32.

The inner end of the lever 32 is provided with an eye 39, in order to permit the engagement with the lever 27 of a s ring 40, which is in turn iii engagement wit an ear 41 carried by an arm 42 projecting inwardly from the inner face of the cross bar 27. By this means, it will be seen that thespring will hold the carriages 28 normally apart or distended, so that immediately upon the operator relieving the lever 32, the carriages will move away from the work-holder 26, as is believed to be ap arent. It is also to be observed that the ever 34 is provided 'at' a free end portion with a plurality of openings 43. These are provided in order to ermit an adjustment of the movement of t e carriages 28.

AliXed to the shafts 18 and within the eX- tension frame, are rollers or pulleys 36, around which passes the endless belts 37. These belts 37 in turn en age a ulley 38 suitably mounted above flic mac ine and approximately on a plane between the shafts 18. By this arrangement, it has been found that the wheels 17 can be adjusted one with relation to the other without affecting the operation of the machine.

I claim:

1. In a polishing machine, the combination of a frame, a plurality of endless belts, a work holder interposed between the o posed portions of the belts, carriages siidably mounted on the frame to contact with the belts to force the belts in a direction towards the work holder, contact faces carried by the belts, a lever pivoted intermediate its length to the frame, said lever intermediate its pivotal connection with the frame and an end thereof bein pivotally connected to a carriage and a Iink pivoted to the lever adjacent its opposite end, said link being in pivotal connection with a second carriage.

2. In a polishing machine, the combination of a frame, a plurality of endless belts, a i

work holder interposed between the opposed portions of the belts, carriages slidably mounted on the frame to contact with the belts to force the belts in a direction towards the work holder, contact faces carried by the belts, a lever pivoted intermediate its length to the frame, said lever intermediate its pivotal connection with the frame and an end thereof being pivotally connected to a carriage, a link pivoted to the lever adjacent its opposite end, said link being in pivotal connection with a second carriage and a contraction spring engaging the lever adjacent the length to hold the carriages normally separated.

3. In a polishin machine, `the combination of a frame, a p urality of endless belts, a work holder interposed between the o posed portions of the belts, carriages siidably mounted on the frame to contact with the belts to force the belts in a direction towards the work holder, contact faces carried by the belts, a lever pivoted intermediate its length to the frame, said lever intermediate its pivotal connection with the frame and an end thereof being ivotally connected to a oarname to this specification in the presence of rage and a lin dpivotd1 toktle lever adjaoentl; tWo subscribing Witnesses. its op osite en sai in einff in vota T oonnegtion With a second cerriae, tllje oon- FRAAK H' DICKSON' nection of the link With the second carriage being adjustable.

In testimony whereof I have signed my Witnesses:

JOSEPH F. DONOVAN, ELLA T. HOURIGAN. 

